Poly(ethylene glycol) crosslinked sulfonated polysulfone composite membranes for forward osmosis |
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| Authors: | Xiaoli Ding Zhiguang Liu Mingming Hua Te Kang Xu Li Yuzhong Zhang |
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| Affiliation: | 1. State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, China;2. Institute of Separation Materials and Process Control, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin, China;3. EnerTech Drilling and Production Company, China National Offshore Oil Corporation, Tianjin, China |
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| Abstract: | Forward osmosis (FO) membranes were prepared by a coating method with poly(ethylene glycol) crosslinked sulfonated polysulfone (SPSf) as a selective layer. The poly(ether sulfone)/SPSf substrate was prepared by phase inversion. The composite membranes were characterized with respect to membrane chemistry (by attenuated total reflectance/Fourier transform infrared spectroscopy and X‐ray photoelectron spectroscopy), hydrophilicity (by static contact angle measurement), and surface morphology (by scanning electron microscopy and atomic force microscopy). The FO performance was also characterized. The effects of the crosslinker concentration on the hydrophilicity and FO performance were investigated. The crosslinked membrane exhibited a high hydrophilicity with a lowest contact angle of 15.5°. Under FO tests, the membranes achieved a higher water flux of 15.2 L m?2 h?1 when used against deionized water as the feed solution and a 2 mol/L sodium chloride (NaCl) solution as the the draw solution. The membranes achieved a magnesium sulfate rejection of 96% and an NaCl rejection of 55% when used against a 1 g/L inorganic salt solution as the feed solution and a 2 mol/L glucose solution as the draw solution. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43941. |
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| Keywords: | coatings crosslinking membranes |
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